Question 1

Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

Accepted Answer

A)   sensory neuron
B)   motor neuron
C)   effector cell
D)   interneuron
E)   receptor cellF) A) and C)
G) B) and D)

Question 2

Spinal nerves exiting the cord from the level of L4 to S4 form the

Accepted Answer

A)   lumbar plexus.
B)   femoral plexus.
C)   sacral plexus.
D)   pelvic plexus.
E)   brachial plexus.F) A) and B)
G) B) and D)

Question 3

Label component "E" on the reflex arc.

Accepted Answer

A)   sensory receptor
B)   effector organ
C)   sensory neuron
D)   motor neuron
E)   interneuronF) A) and B)
G) B) and E)

Question 4

The spinal cord ends at the

Accepted Answer

A)   sacrum.
B)   coccyx.
C)   5th lumbar vertebrae.
D)   2nd lumbar vertebrae.E) A) and B)
F) None of the above

Question 5

Label component "C" on the reflex arc.

Accepted Answer

A)   sensory receptor
B)   effector organ
C)   sensory neuron
D)   motor neuron
E)   interneuronF) C) and E)
G) A) and C)

Question 6

The sensory receptor of the stretch reflex is the

Accepted Answer

A)   Golgi tendon organ.
B)   muscle spindle.
C)   dorsal root ganglion.
D)   collateral axon.
E)   alpha motor neurons.F) B) and E)
G) None of the above

Question 7

The reflex that prevents excessive tension in a muscle is the

Accepted Answer

A)   stretch reflex.
B)   withdrawal reflex.
C)   Golgi tendon reflex.
D)   reciprocal reflex.
E)   crossed extensor reflex.F) A) and D)
G) C) and D)

Question 8

What space, found between the vertebral wall and the dura mater, is the area for injecting anesthesia for childbirth?

Accepted Answer

A)   subarachnoid space
B)   subdural space
C)   epidural space
D)   epipial spaceE) C) and D)
F) A) and B)

Question 9

The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the

Accepted Answer

A)   ramus communicans.
B)   lateral ramus.
C)   dorsal ramus.
D)   ventral ramus.
E)   medial ramus.F) C) and D)
G) A) and B)

Question 10

Branches of the ____ nerve are anesthetized before a doctor performs an episiotomy for childbirth.

Accepted Answer

A)   genitofemoral
B)   gluteal
C)   cutaneous femoral
D)   pudendal
E)   common fibular (peroneal) F) C) and D)
G) A) and B)

Question 11

Cutaneous sensory distribution of a spinal nerve can be mapped as a ________.
dermatome

Accepted Answer

The answer of Cutaneous sensory distribution of a spinal nerve...

Question 12

During a spinal tap, cerebrospinal fluid is obtained from which of the following locations?

Accepted Answer

A)   dural sinus
B)   epidural space
C)   subarachnoid space
D)   subdural space
E)   sagittal sinusF) A) and E)
G) A) and B)

Question 13

Adduction of the thigh involves the

Accepted Answer

A)   peroneal nerve.
B)   femoral nerve.
C)   obturator nerve.
D)   pudendal nerve.
E)   tibial nerve.F) A) and E)
G) D) and E)

Question 14

Match the nerve to the correct function.
-median nerve

Accepted Answer

A)  provides motor innervation to the biceps brachii
B)  innervates two forearm muscles plus most of the intrinsic hand muscles
C)  innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb
D)  innervates the deltoid and teres minor muscles
E)  innervates the triceps brachiiF) B) and C)
G) B) and D)

Question 15

The brachial plexus supplies nerves that function to contract which of the following?

Accepted Answer

A)   the diaphragm
B)   intercostal muscles
C)   muscles of the arm and forearm
D)   muscles of the lower limb
E)   abdominal musclesF) D) and E)
G) All of the above

Question 16

Match the nerve to the correct function.
-ulnar nerve

Accepted Answer

A)  provides motor innervation to the biceps brachii
B)  innervates two forearm muscles plus most of the intrinsic hand muscles
C)  innervates all but one of the flexor muscles of the forearm and most of the hand muscles near the thumb
D)  innervates the deltoid and teres minor muscles
E)  innervates the triceps brachiiF) A) and E)
G) A) and D)

Question 17

Where is cerebrospinal fluid found around the spinal cord?

Accepted Answer

A)   subdural space
B)   epidural space
C)   thecal sac
D)   subarachnoid spaceE) C) and D)
F) A) and B)

Question 18

Label component "D" on the reflex arc.

Accepted Answer

A)   sensory receptor
B)   effector organ
C)   sensory neuron
D)   motor neuron
E)   interneuronF) A) and E)
G) A) and D)

Question 19

Match the disorder with its description.
-meningitis

Accepted Answer

A)  pain radiating down the back of the thigh and leg
B)  stiffness in the neck and headache
C)  inflammation of a nerve
D)  pain along a nerve tract
E)  loss of sensationF) B) and C)
G) B) and E)

Question 20

Dermatomal maps are important clinically because they

Accepted Answer

A)   can be used to check for motor function.
B)   locate the position of cranial nerves.
C)   can be used to help locate nerve damage.
D)   indicate what muscles are innervated by each spinal nerve.
E)   can be used to detect cranial nerve damage.F) C) and D)
G) A) and B)

Exam 12: Spinal Cord and Spinal Nerves

Branches of the ____ nerve are anesthetized before a doctor performs an episiotomy for childbirth.

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Spinal nerves exiting the cord from the level of L4 to S4 form the

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Where is cerebrospinal fluid found around the spinal cord?

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Cutaneous sensory distribution of a spinal nerve can be mapped as a ________. dermatome

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The branch of a spinal nerve that innervates deep muscles on the dorsal thorax is the

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Dermatomal maps are important clinically because they

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What space, found between the vertebral wall and the dura mater, is the area for injecting anesthesia for childbirth?

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Match the disorder with its description. -meningitis

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Match the nerve to the correct function. -ulnar nerve

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Label component "E" on the reflex arc.

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During a spinal tap, cerebrospinal fluid is obtained from which of the following locations?

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The sensory receptor of the stretch reflex is the

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Label component "C" on the reflex arc.

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Which portion of a reflex arc is most likely to be located entirely within the central nervous system?

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The brachial plexus supplies nerves that function to contract which of the following?

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Adduction of the thigh involves the

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Label component "D" on the reflex arc.

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Match the nerve to the correct function. -median nerve

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The spinal cord ends at the

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The reflex that prevents excessive tension in a muscle is the

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